C/ELFfileParsing - C/test_findfunc.org · AvaSmith-CodingSamples

#+TITLE: Tests for findfunc
#+TESTY: PREFIX="findfunc"
#+TESTY: USE_VALGRIND=1

# NOTE: some tests use multiple subtests making it harder to
# regenerate tests via testy-regen

* somefuncs.o return_five print
Runs on somefuncs.o, print out bytes of the return_five function.
#+TESTY: program='./findfunc test-input/somefuncs.o return_five print'
#+BEGIN_SRC text
file_bytes at: 0x600000000000
Section Headers Found:
- 904 bytes from start of file
- 12 sections total
- 0x600000000388 section header virtual address
Section Header Names in Section 11
- 800 bytes from start of file
- 103 total bytes
- 0x600000000320 .shstrtab virtual address

Scanning Section Headers for Relevant Sections
[ 0]: 
[ 1]: .text
[ 2]: .data
[ 3]: .bss
[ 4]: .comment
[ 5]: .note.GNU-stack
[ 6]: .note.gnu.property
[ 7]: .eh_frame
[ 8]: .rela.eh_frame
[ 9]: .symtab
[10]: .strtab
[11]: .shstrtab

.symtab located
- 408 bytes from start of file
- 216 bytes total size
- 24 bytes per entry
- 9 number of entries
- 0x600000000198 .symtab virtual addres
.strtab located
- 624 bytes from start of file
- 75 total bytes in section
- 0x600000000270 .strtab virtual addres
.text located
- 64 bytes offset from start of file
- 0x0 preferred address for .text
- 0x600000000040 .text virtual addres

Scanning Symbol Table for symbol 'return_five'
[ 0]: 
[ 1]: somefuncs.c
[ 2]: 
[ 3]: return_five
[ 4]: global_int
[ 5]: my_pow
[ 6]: an_array
[ 7]: triple
[ 8]: meaning_of_life

Found 'return_five' in symbol table
- 11 size
- 1 section index
- 18 info
Calculating location of 'return_five' in .text section
- 0x0 preferred address of function (st_value)
- 0x0 preferred address of .text section
- 0 offset in .text of start of function
- 0x600000000040 virtual address of .text section
- 0x600000000040 virtual address of function

MODE: print
11 bytes of function 'return_five'
0000: 55 48 89 e5 b8 05 00 00 
0008: 00 5d c3 
#+END_SRC

* somefuncs.o meaning_of_life print 
Runs on somefuncs.o, print out bytes of the meaning_of_life function.
#+TESTY: program='./findfunc test-input/somefuncs.o meaning_of_life print'
#+BEGIN_SRC text
file_bytes at: 0x600000000000
Section Headers Found:
- 904 bytes from start of file
- 12 sections total
- 0x600000000388 section header virtual address
Section Header Names in Section 11
- 800 bytes from start of file
- 103 total bytes
- 0x600000000320 .shstrtab virtual address

Scanning Section Headers for Relevant Sections
[ 0]: 
[ 1]: .text
[ 2]: .data
[ 3]: .bss
[ 4]: .comment
[ 5]: .note.GNU-stack
[ 6]: .note.gnu.property
[ 7]: .eh_frame
[ 8]: .rela.eh_frame
[ 9]: .symtab
[10]: .strtab
[11]: .shstrtab

.symtab located
- 408 bytes from start of file
- 216 bytes total size
- 24 bytes per entry
- 9 number of entries
- 0x600000000198 .symtab virtual addres
.strtab located
- 624 bytes from start of file
- 75 total bytes in section
- 0x600000000270 .strtab virtual addres
.text located
- 64 bytes offset from start of file
- 0x0 preferred address for .text
- 0x600000000040 .text virtual addres

Scanning Symbol Table for symbol 'meaning_of_life'
[ 0]: 
[ 1]: somefuncs.c
[ 2]: 
[ 3]: return_five
[ 4]: global_int
[ 5]: my_pow
[ 6]: an_array
[ 7]: triple
[ 8]: meaning_of_life

Found 'meaning_of_life' in symbol table
- 19 size
- 1 section index
- 18 info
Calculating location of 'meaning_of_life' in .text section
- 0x5d preferred address of function (st_value)
- 0x0 preferred address of .text section
- 93 offset in .text of start of function
- 0x600000000040 virtual address of .text section
- 0x60000000009d virtual address of function

MODE: print
19 bytes of function 'meaning_of_life'
0000: 55 48 89 e5 c7 45 fc 15 
0008: 00 00 00 d1 65 fc 8b 45 
0010: fc 5d c3 
#+END_SRC

* somefuncs.o my_pow print 
Runs on somefuncs.o, print out bytes of the my_pow function.
#+TESTY: program='./findfunc test-input/somefuncs.o my_pow print'
#+BEGIN_SRC text
file_bytes at: 0x600000000000
Section Headers Found:
- 904 bytes from start of file
- 12 sections total
- 0x600000000388 section header virtual address
Section Header Names in Section 11
- 800 bytes from start of file
- 103 total bytes
- 0x600000000320 .shstrtab virtual address

Scanning Section Headers for Relevant Sections
[ 0]: 
[ 1]: .text
[ 2]: .data
[ 3]: .bss
[ 4]: .comment
[ 5]: .note.GNU-stack
[ 6]: .note.gnu.property
[ 7]: .eh_frame
[ 8]: .rela.eh_frame
[ 9]: .symtab
[10]: .strtab
[11]: .shstrtab

.symtab located
- 408 bytes from start of file
- 216 bytes total size
- 24 bytes per entry
- 9 number of entries
- 0x600000000198 .symtab virtual addres
.strtab located
- 624 bytes from start of file
- 75 total bytes in section
- 0x600000000270 .strtab virtual addres
.text located
- 64 bytes offset from start of file
- 0x0 preferred address for .text
- 0x600000000040 .text virtual addres

Scanning Symbol Table for symbol 'my_pow'
[ 0]: 
[ 1]: somefuncs.c
[ 2]: 
[ 3]: return_five
[ 4]: global_int
[ 5]: my_pow
[ 6]: an_array
[ 7]: triple
[ 8]: meaning_of_life

Found 'my_pow' in symbol table
- 53 size
- 1 section index
- 18 info
Calculating location of 'my_pow' in .text section
- 0xb preferred address of function (st_value)
- 0x0 preferred address of .text section
- 11 offset in .text of start of function
- 0x600000000040 virtual address of .text section
- 0x60000000004b virtual address of function

MODE: print
53 bytes of function 'my_pow'
0000: 55 48 89 e5 89 7d ec 89 
0008: 75 e8 c7 45 f8 01 00 00 
0010: 00 c7 45 fc 00 00 00 00 
0018: eb 0e 8b 45 f8 0f af 45 
0020: ec 89 45 f8 83 45 fc 01 
0028: 8b 45 fc 3b 45 e8 7c ea 
0030: 8b 45 f8 5d c3 
#+END_SRC

* somefuncs.o triple print 
Runs on somefuncs.o, print out bytes of the my_pow function.
#+TESTY: program='./findfunc test-input/somefuncs.o triple print'
#+BEGIN_SRC text
file_bytes at: 0x600000000000
Section Headers Found:
- 904 bytes from start of file
- 12 sections total
- 0x600000000388 section header virtual address
Section Header Names in Section 11
- 800 bytes from start of file
- 103 total bytes
- 0x600000000320 .shstrtab virtual address

Scanning Section Headers for Relevant Sections
[ 0]: 
[ 1]: .text
[ 2]: .data
[ 3]: .bss
[ 4]: .comment
[ 5]: .note.GNU-stack
[ 6]: .note.gnu.property
[ 7]: .eh_frame
[ 8]: .rela.eh_frame
[ 9]: .symtab
[10]: .strtab
[11]: .shstrtab

.symtab located
- 408 bytes from start of file
- 216 bytes total size
- 24 bytes per entry
- 9 number of entries
- 0x600000000198 .symtab virtual addres
.strtab located
- 624 bytes from start of file
- 75 total bytes in section
- 0x600000000270 .strtab virtual addres
.text located
- 64 bytes offset from start of file
- 0x0 preferred address for .text
- 0x600000000040 .text virtual addres

Scanning Symbol Table for symbol 'triple'
[ 0]: 
[ 1]: somefuncs.c
[ 2]: 
[ 3]: return_five
[ 4]: global_int
[ 5]: my_pow
[ 6]: an_array
[ 7]: triple
[ 8]: meaning_of_life

Found 'triple' in symbol table
- 29 size
- 1 section index
- 18 info
Calculating location of 'triple' in .text section
- 0x40 preferred address of function (st_value)
- 0x0 preferred address of .text section
- 64 offset in .text of start of function
- 0x600000000040 virtual address of .text section
- 0x600000000080 virtual address of function

MODE: print
29 bytes of function 'triple'
0000: 55 48 89 e5 48 89 7d f8 
0008: 48 8b 45 f8 8b 10 89 d0 
0010: 01 c0 01 c2 48 8b 45 f8 
0018: 89 10 90 5d c3 
#+END_SRC

* mymain.o return_seven print 
Runs on mymain.o, print out bytes of the return_seven function.
#+TESTY: program='./findfunc test-input/mymain.o return_seven print'
#+BEGIN_SRC text
file_bytes at: 0x600000000000
Section Headers Found:
- 872 bytes from start of file
- 14 sections total
- 0x600000000368 section header virtual address
Section Header Names in Section 13
- 752 bytes from start of file
- 116 total bytes
- 0x6000000002f0 .shstrtab virtual address

Scanning Section Headers for Relevant Sections
[ 0]: 
[ 1]: .text
[ 2]: .rela.text
[ 3]: .data
[ 4]: .bss
[ 5]: .rodata
[ 6]: .comment
[ 7]: .note.GNU-stack
[ 8]: .note.gnu.property
[ 9]: .eh_frame
[10]: .rela.eh_frame
[11]: .symtab
[12]: .strtab
[13]: .shstrtab

.symtab located
- 344 bytes from start of file
- 192 bytes total size
- 24 bytes per entry
- 8 number of entries
- 0x600000000158 .symtab virtual addres
.strtab located
- 536 bytes from start of file
- 43 total bytes in section
- 0x600000000218 .strtab virtual addres
.text located
- 64 bytes offset from start of file
- 0x0 preferred address for .text
- 0x600000000040 .text virtual addres

Scanning Symbol Table for symbol 'return_seven'
[ 0]: 
[ 1]: mymain.c
[ 2]: 
[ 3]: 
[ 4]: main
[ 5]: puts
[ 6]: say_hello
[ 7]: return_seven

Found 'return_seven' in symbol table
- 11 size
- 1 section index
- 18 info
Calculating location of 'return_seven' in .text section
- 0x3f preferred address of function (st_value)
- 0x0 preferred address of .text section
- 63 offset in .text of start of function
- 0x600000000040 virtual address of .text section
- 0x60000000007f virtual address of function

MODE: print
11 bytes of function 'return_seven'
0000: 55 48 89 e5 b8 07 00 00 
0008: 00 5d c3 
#+END_SRC

* mymain return_seven print 
Runs on mymain, print out bytes of the return_seven function.
#+TESTY: program='./findfunc test-input/mymain return_seven print'
#+BEGIN_SRC text
file_bytes at: 0x600000000000
Section Headers Found:
- 18256 bytes from start of file
- 37 sections total
- 0x600000004750 section header virtual address
Section Header Names in Section 36
- 17877 bytes from start of file
- 374 total bytes
- 0x6000000045d5 .shstrtab virtual address

Scanning Section Headers for Relevant Sections
[ 0]: 
[ 1]: .interp
[ 2]: .note.gnu.property
[ 3]: .note.gnu.build-id
[ 4]: .note.ABI-tag
[ 5]: .gnu.hash
[ 6]: .dynsym
[ 7]: .dynstr
[ 8]: .gnu.version
[ 9]: .gnu.version_r
[10]: .rela.dyn
[11]: .rela.plt
[12]: .init
[13]: .plt
[14]: .text
[15]: .fini
[16]: .rodata
[17]: .eh_frame_hdr
[18]: .eh_frame
[19]: .init_array
[20]: .fini_array
[21]: .dynamic
[22]: .got
[23]: .got.plt
[24]: .data
[25]: .bss
[26]: .comment
[27]: .debug_aranges
[28]: .debug_info
[29]: .debug_abbrev
[30]: .debug_line
[31]: .debug_str
[32]: .debug_line_str
[33]: .debug_rnglists
[34]: .symtab
[35]: .strtab
[36]: .shstrtab

.symtab located
- 16432 bytes from start of file
- 936 bytes total size
- 24 bytes per entry
- 39 number of entries
- 0x600000004030 .symtab virtual addres
.strtab located
- 17368 bytes from start of file
- 509 total bytes in section
- 0x6000000043d8 .strtab virtual addres
.text located
- 4160 bytes offset from start of file
- 0x1040 preferred address for .text
- 0x600000001040 .text virtual addres

Scanning Symbol Table for symbol 'return_seven'
[ 0]: 
[ 1]: abi-note.c
[ 2]: __abi_tag
[ 3]: init.c
[ 4]: crtstuff.c
[ 5]: deregister_tm_clones
[ 6]: register_tm_clones
[ 7]: __do_global_dtors_aux
[ 8]: completed.0
[ 9]: __do_global_dtors_aux_fini_array_entry
[10]: frame_dummy
[11]: __frame_dummy_init_array_entry
[12]: mymain.c
[13]: crtstuff.c
[14]: __FRAME_END__
[15]: 
[16]: _DYNAMIC
[17]: __GNU_EH_FRAME_HDR
[18]: _GLOBAL_OFFSET_TABLE_
[19]: __libc_start_main@GLIBC_2.34
[20]: _ITM_deregisterTMCloneTable
[21]: data_start
[22]: puts@GLIBC_2.2.5
[23]: _edata
[24]: _fini
[25]: __data_start
[26]: __gmon_start__
[27]: __dso_handle
[28]: _IO_stdin_used
[29]: _end
[30]: _start
[31]: return_seven
[32]: __bss_start
[33]: main
[34]: say_hello
[35]: __TMC_END__
[36]: _ITM_registerTMCloneTable
[37]: __cxa_finalize@GLIBC_2.2.5
[38]: _init

Found 'return_seven' in symbol table
- 11 size
- 14 section index
- 18 info
Calculating location of 'return_seven' in .text section
- 0x1178 preferred address of function (st_value)
- 0x1040 preferred address of .text section
- 312 offset in .text of start of function
- 0x600000001040 virtual address of .text section
- 0x600000001178 virtual address of function

MODE: print
11 bytes of function 'return_seven'
0000: 55 48 89 e5 b8 07 00 00 
0008: 00 5d c3 
#+END_SRC

* somefuncs.o return_five call
Runs on somefuncs.o, call the return_five function which takes no
arguments
#+TESTY: program='./findfunc test-input/somefuncs.o return_five call "int (*)(void)"'
#+BEGIN_SRC text
file_bytes at: 0x600000000000
Section Headers Found:
- 904 bytes from start of file
- 12 sections total
- 0x600000000388 section header virtual address
Section Header Names in Section 11
- 800 bytes from start of file
- 103 total bytes
- 0x600000000320 .shstrtab virtual address

Scanning Section Headers for Relevant Sections
[ 0]: 
[ 1]: .text
[ 2]: .data
[ 3]: .bss
[ 4]: .comment
[ 5]: .note.GNU-stack
[ 6]: .note.gnu.property
[ 7]: .eh_frame
[ 8]: .rela.eh_frame
[ 9]: .symtab
[10]: .strtab
[11]: .shstrtab

.symtab located
- 408 bytes from start of file
- 216 bytes total size
- 24 bytes per entry
- 9 number of entries
- 0x600000000198 .symtab virtual addres
.strtab located
- 624 bytes from start of file
- 75 total bytes in section
- 0x600000000270 .strtab virtual addres
.text located
- 64 bytes offset from start of file
- 0x0 preferred address for .text
- 0x600000000040 .text virtual addres

Scanning Symbol Table for symbol 'return_five'
[ 0]: 
[ 1]: somefuncs.c
[ 2]: 
[ 3]: return_five
[ 4]: global_int
[ 5]: my_pow
[ 6]: an_array
[ 7]: triple
[ 8]: meaning_of_life

Found 'return_five' in symbol table
- 11 size
- 1 section index
- 18 info
Calculating location of 'return_five' in .text section
- 0x0 preferred address of function (st_value)
- 0x0 preferred address of .text section
- 0 offset in .text of start of function
- 0x600000000040 virtual address of .text section
- 0x600000000040 virtual address of function

MODE: call
func_type: int (*)(void)
running function (no arguments)
returned: 5
#+END_SRC

* somefuncs.o meaning_of_life call
Runs on somefuncs.o, call the meaning_of_life function which takes no
arguments
#+TESTY: program='./findfunc test-input/somefuncs.o meaning_of_life call "int (*)(void)"'
#+BEGIN_SRC text
file_bytes at: 0x600000000000
Section Headers Found:
- 904 bytes from start of file
- 12 sections total
- 0x600000000388 section header virtual address
Section Header Names in Section 11
- 800 bytes from start of file
- 103 total bytes
- 0x600000000320 .shstrtab virtual address

Scanning Section Headers for Relevant Sections
[ 0]: 
[ 1]: .text
[ 2]: .data
[ 3]: .bss
[ 4]: .comment
[ 5]: .note.GNU-stack
[ 6]: .note.gnu.property
[ 7]: .eh_frame
[ 8]: .rela.eh_frame
[ 9]: .symtab
[10]: .strtab
[11]: .shstrtab

.symtab located
- 408 bytes from start of file
- 216 bytes total size
- 24 bytes per entry
- 9 number of entries
- 0x600000000198 .symtab virtual addres
.strtab located
- 624 bytes from start of file
- 75 total bytes in section
- 0x600000000270 .strtab virtual addres
.text located
- 64 bytes offset from start of file
- 0x0 preferred address for .text
- 0x600000000040 .text virtual addres

Scanning Symbol Table for symbol 'meaning_of_life'
[ 0]: 
[ 1]: somefuncs.c
[ 2]: 
[ 3]: return_five
[ 4]: global_int
[ 5]: my_pow
[ 6]: an_array
[ 7]: triple
[ 8]: meaning_of_life

Found 'meaning_of_life' in symbol table
- 19 size
- 1 section index
- 18 info
Calculating location of 'meaning_of_life' in .text section
- 0x5d preferred address of function (st_value)
- 0x0 preferred address of .text section
- 93 offset in .text of start of function
- 0x600000000040 virtual address of .text section
- 0x60000000009d virtual address of function

MODE: call
func_type: int (*)(void)
running function (no arguments)
returned: 42
#+END_SRC

* somefuncs.o my_pow call 2 8
Runs on somefuncs.o, call the my_pow function which takes 2 arguments
and returns an int.
#+TESTY: program='./findfunc test-input/somefuncs.o my_pow call "int (*)(int,int)" 2 8'
#+BEGIN_SRC text
file_bytes at: 0x600000000000
Section Headers Found:
- 904 bytes from start of file
- 12 sections total
- 0x600000000388 section header virtual address
Section Header Names in Section 11
- 800 bytes from start of file
- 103 total bytes
- 0x600000000320 .shstrtab virtual address

Scanning Section Headers for Relevant Sections
[ 0]: 
[ 1]: .text
[ 2]: .data
[ 3]: .bss
[ 4]: .comment
[ 5]: .note.GNU-stack
[ 6]: .note.gnu.property
[ 7]: .eh_frame
[ 8]: .rela.eh_frame
[ 9]: .symtab
[10]: .strtab
[11]: .shstrtab

.symtab located
- 408 bytes from start of file
- 216 bytes total size
- 24 bytes per entry
- 9 number of entries
- 0x600000000198 .symtab virtual addres
.strtab located
- 624 bytes from start of file
- 75 total bytes in section
- 0x600000000270 .strtab virtual addres
.text located
- 64 bytes offset from start of file
- 0x0 preferred address for .text
- 0x600000000040 .text virtual addres

Scanning Symbol Table for symbol 'my_pow'
[ 0]: 
[ 1]: somefuncs.c
[ 2]: 
[ 3]: return_five
[ 4]: global_int
[ 5]: my_pow
[ 6]: an_array
[ 7]: triple
[ 8]: meaning_of_life

Found 'my_pow' in symbol table
- 53 size
- 1 section index
- 18 info
Calculating location of 'my_pow' in .text section
- 0xb preferred address of function (st_value)
- 0x0 preferred address of .text section
- 11 offset in .text of start of function
- 0x600000000040 virtual address of .text section
- 0x60000000004b virtual address of function

MODE: call
func_type: int (*)(int,int)
running function with arguments (2,8)
returned: 256
#+END_SRC

* somefuncs.o my_pow call 7 5 
Runs on somefuncs.o, call the my_pow function which takes 2 arguments
and returns an int.
#+TESTY: program='./findfunc test-input/somefuncs.o my_pow call "int (*)(int,int)" 7 5'
#+BEGIN_SRC text
file_bytes at: 0x600000000000
Section Headers Found:
- 904 bytes from start of file
- 12 sections total
- 0x600000000388 section header virtual address
Section Header Names in Section 11
- 800 bytes from start of file
- 103 total bytes
- 0x600000000320 .shstrtab virtual address

Scanning Section Headers for Relevant Sections
[ 0]: 
[ 1]: .text
[ 2]: .data
[ 3]: .bss
[ 4]: .comment
[ 5]: .note.GNU-stack
[ 6]: .note.gnu.property
[ 7]: .eh_frame
[ 8]: .rela.eh_frame
[ 9]: .symtab
[10]: .strtab
[11]: .shstrtab

.symtab located
- 408 bytes from start of file
- 216 bytes total size
- 24 bytes per entry
- 9 number of entries
- 0x600000000198 .symtab virtual addres
.strtab located
- 624 bytes from start of file
- 75 total bytes in section
- 0x600000000270 .strtab virtual addres
.text located
- 64 bytes offset from start of file
- 0x0 preferred address for .text
- 0x600000000040 .text virtual addres

Scanning Symbol Table for symbol 'my_pow'
[ 0]: 
[ 1]: somefuncs.c
[ 2]: 
[ 3]: return_five
[ 4]: global_int
[ 5]: my_pow
[ 6]: an_array
[ 7]: triple
[ 8]: meaning_of_life

Found 'my_pow' in symbol table
- 53 size
- 1 section index
- 18 info
Calculating location of 'my_pow' in .text section
- 0xb preferred address of function (st_value)
- 0x0 preferred address of .text section
- 11 offset in .text of start of function
- 0x600000000040 virtual address of .text section
- 0x60000000004b virtual address of function

MODE: call
func_type: int (*)(int,int)
running function with arguments (7,5)
returned: 16807
#+END_SRC

* somefuncs.o triple call 14
Runs on somefuncs.o, call the my_pow function which takes an int
pointer arg.
#+TESTY: program='./findfunc test-input/somefuncs.o triple call "void (*)(int*)" 14'
#+BEGIN_SRC text
file_bytes at: 0x600000000000
Section Headers Found:
- 904 bytes from start of file
- 12 sections total
- 0x600000000388 section header virtual address
Section Header Names in Section 11
- 800 bytes from start of file
- 103 total bytes
- 0x600000000320 .shstrtab virtual address

Scanning Section Headers for Relevant Sections
[ 0]: 
[ 1]: .text
[ 2]: .data
[ 3]: .bss
[ 4]: .comment
[ 5]: .note.GNU-stack
[ 6]: .note.gnu.property
[ 7]: .eh_frame
[ 8]: .rela.eh_frame
[ 9]: .symtab
[10]: .strtab
[11]: .shstrtab

.symtab located
- 408 bytes from start of file
- 216 bytes total size
- 24 bytes per entry
- 9 number of entries
- 0x600000000198 .symtab virtual addres
.strtab located
- 624 bytes from start of file
- 75 total bytes in section
- 0x600000000270 .strtab virtual addres
.text located
- 64 bytes offset from start of file
- 0x0 preferred address for .text
- 0x600000000040 .text virtual addres

Scanning Symbol Table for symbol 'triple'
[ 0]: 
[ 1]: somefuncs.c
[ 2]: 
[ 3]: return_five
[ 4]: global_int
[ 5]: my_pow
[ 6]: an_array
[ 7]: triple
[ 8]: meaning_of_life

Found 'triple' in symbol table
- 29 size
- 1 section index
- 18 info
Calculating location of 'triple' in .text section
- 0x40 preferred address of function (st_value)
- 0x0 preferred address of .text section
- 64 offset in .text of start of function
- 0x600000000040 virtual address of .text section
- 0x600000000080 virtual address of function

MODE: call
func_type: void (*)(int*)
running function, arg points to 14
arg is now: 42
#+END_SRC

* somefuncs.o triple call 33
Runs on somefuncs.o, call the my_pow function which takes an int
pointer arg.
#+TESTY: program='./findfunc test-input/somefuncs.o triple call "void (*)(int*)" 33'
#+BEGIN_SRC text
file_bytes at: 0x600000000000
Section Headers Found:
- 904 bytes from start of file
- 12 sections total
- 0x600000000388 section header virtual address
Section Header Names in Section 11
- 800 bytes from start of file
- 103 total bytes
- 0x600000000320 .shstrtab virtual address

Scanning Section Headers for Relevant Sections
[ 0]: 
[ 1]: .text
[ 2]: .data
[ 3]: .bss
[ 4]: .comment
[ 5]: .note.GNU-stack
[ 6]: .note.gnu.property
[ 7]: .eh_frame
[ 8]: .rela.eh_frame
[ 9]: .symtab
[10]: .strtab
[11]: .shstrtab

.symtab located
- 408 bytes from start of file
- 216 bytes total size
- 24 bytes per entry
- 9 number of entries
- 0x600000000198 .symtab virtual addres
.strtab located
- 624 bytes from start of file
- 75 total bytes in section
- 0x600000000270 .strtab virtual addres
.text located
- 64 bytes offset from start of file
- 0x0 preferred address for .text
- 0x600000000040 .text virtual addres

Scanning Symbol Table for symbol 'triple'
[ 0]: 
[ 1]: somefuncs.c
[ 2]: 
[ 3]: return_five
[ 4]: global_int
[ 5]: my_pow
[ 6]: an_array
[ 7]: triple
[ 8]: meaning_of_life

Found 'triple' in symbol table
- 29 size
- 1 section index
- 18 info
Calculating location of 'triple' in .text section
- 0x40 preferred address of function (st_value)
- 0x0 preferred address of .text section
- 64 offset in .text of start of function
- 0x600000000040 virtual address of .text section
- 0x600000000080 virtual address of function

MODE: call
func_type: void (*)(int*)
running function, arg points to 33
arg is now: 99
#+END_SRC

* mymain.o return_seven call
Runs on mymain.o, call the return_seven function which takes no
arguments.
#+TESTY: program='./findfunc test-input/mymain.o return_seven call "int (*)(void)"'
#+BEGIN_SRC text
file_bytes at: 0x600000000000
Section Headers Found:
- 872 bytes from start of file
- 14 sections total
- 0x600000000368 section header virtual address
Section Header Names in Section 13
- 752 bytes from start of file
- 116 total bytes
- 0x6000000002f0 .shstrtab virtual address

Scanning Section Headers for Relevant Sections
[ 0]: 
[ 1]: .text
[ 2]: .rela.text
[ 3]: .data
[ 4]: .bss
[ 5]: .rodata
[ 6]: .comment
[ 7]: .note.GNU-stack
[ 8]: .note.gnu.property
[ 9]: .eh_frame
[10]: .rela.eh_frame
[11]: .symtab
[12]: .strtab
[13]: .shstrtab

.symtab located
- 344 bytes from start of file
- 192 bytes total size
- 24 bytes per entry
- 8 number of entries
- 0x600000000158 .symtab virtual addres
.strtab located
- 536 bytes from start of file
- 43 total bytes in section
- 0x600000000218 .strtab virtual addres
.text located
- 64 bytes offset from start of file
- 0x0 preferred address for .text
- 0x600000000040 .text virtual addres

Scanning Symbol Table for symbol 'return_seven'
[ 0]: 
[ 1]: mymain.c
[ 2]: 
[ 3]: 
[ 4]: main
[ 5]: puts
[ 6]: say_hello
[ 7]: return_seven

Found 'return_seven' in symbol table
- 11 size
- 1 section index
- 18 info
Calculating location of 'return_seven' in .text section
- 0x3f preferred address of function (st_value)
- 0x0 preferred address of .text section
- 63 offset in .text of start of function
- 0x600000000040 virtual address of .text section
- 0x60000000007f virtual address of function

MODE: call
func_type: int (*)(void)
running function (no arguments)
returned: 7
#+END_SRC

* mymain return_seven call
Runs on mymain, call the return_seven function which takes no
arguments.
#+TESTY: program='./findfunc test-input/mymain return_seven call "int (*)(void)"'
#+BEGIN_SRC text
file_bytes at: 0x600000000000
Section Headers Found:
- 18256 bytes from start of file
- 37 sections total
- 0x600000004750 section header virtual address
Section Header Names in Section 36
- 17877 bytes from start of file
- 374 total bytes
- 0x6000000045d5 .shstrtab virtual address

Scanning Section Headers for Relevant Sections
[ 0]: 
[ 1]: .interp
[ 2]: .note.gnu.property
[ 3]: .note.gnu.build-id
[ 4]: .note.ABI-tag
[ 5]: .gnu.hash
[ 6]: .dynsym
[ 7]: .dynstr
[ 8]: .gnu.version
[ 9]: .gnu.version_r
[10]: .rela.dyn
[11]: .rela.plt
[12]: .init
[13]: .plt
[14]: .text
[15]: .fini
[16]: .rodata
[17]: .eh_frame_hdr
[18]: .eh_frame
[19]: .init_array
[20]: .fini_array
[21]: .dynamic
[22]: .got
[23]: .got.plt
[24]: .data
[25]: .bss
[26]: .comment
[27]: .debug_aranges
[28]: .debug_info
[29]: .debug_abbrev
[30]: .debug_line
[31]: .debug_str
[32]: .debug_line_str
[33]: .debug_rnglists
[34]: .symtab
[35]: .strtab
[36]: .shstrtab

.symtab located
- 16432 bytes from start of file
- 936 bytes total size
- 24 bytes per entry
- 39 number of entries
- 0x600000004030 .symtab virtual addres
.strtab located
- 17368 bytes from start of file
- 509 total bytes in section
- 0x6000000043d8 .strtab virtual addres
.text located
- 4160 bytes offset from start of file
- 0x1040 preferred address for .text
- 0x600000001040 .text virtual addres

Scanning Symbol Table for symbol 'return_seven'
[ 0]: 
[ 1]: abi-note.c
[ 2]: __abi_tag
[ 3]: init.c
[ 4]: crtstuff.c
[ 5]: deregister_tm_clones
[ 6]: register_tm_clones
[ 7]: __do_global_dtors_aux
[ 8]: completed.0
[ 9]: __do_global_dtors_aux_fini_array_entry
[10]: frame_dummy
[11]: __frame_dummy_init_array_entry
[12]: mymain.c
[13]: crtstuff.c
[14]: __FRAME_END__
[15]: 
[16]: _DYNAMIC
[17]: __GNU_EH_FRAME_HDR
[18]: _GLOBAL_OFFSET_TABLE_
[19]: __libc_start_main@GLIBC_2.34
[20]: _ITM_deregisterTMCloneTable
[21]: data_start
[22]: puts@GLIBC_2.2.5
[23]: _edata
[24]: _fini
[25]: __data_start
[26]: __gmon_start__
[27]: __dso_handle
[28]: _IO_stdin_used
[29]: _end
[30]: _start
[31]: return_seven
[32]: __bss_start
[33]: main
[34]: say_hello
[35]: __TMC_END__
[36]: _ITM_registerTMCloneTable
[37]: __cxa_finalize@GLIBC_2.2.5
[38]: _init

Found 'return_seven' in symbol table
- 11 size
- 14 section index
- 18 info
Calculating location of 'return_seven' in .text section
- 0x1178 preferred address of function (st_value)
- 0x1040 preferred address of .text section
- 312 offset in .text of start of function
- 0x600000001040 virtual address of .text section
- 0x600000001178 virtual address of function

MODE: call
func_type: int (*)(void)
running function (no arguments)
returned: 7
#+END_SRC

* Wrong Magic Bytes
If wrong magic bytes occur at the beginning of the file, bail out
immediately 
#+TESTY: program='./findfunc test-input/mymain.c return_seven print'
#+BEGIN_SRC text
file_bytes at: 0x600000000000
ERROR: Magic bytes wrong, this is not an ELF file
#+END_SRC

* Missing Symbol Table
Checks that when the symbol table is not found an error message is
printed. Symbol tables can be stripped out of executables via the
'strip' command.
#+TESTY: program='./findfunc test-input/stripped_mymain return_seven print'
#+BEGIN_SRC text
file_bytes at: 0x600000000000
Section Headers Found:
- 694408 bytes from start of file
- 30 sections total
- 0x6000000a9888 section header virtual address
Section Header Names in Section 29
- 694076 bytes from start of file
- 327 total bytes
- 0x6000000a973c .shstrtab virtual address

Scanning Section Headers for Relevant Sections
[ 0]: 
[ 1]: .note.gnu.property
[ 2]: .note.gnu.build-id
[ 3]: .note.ABI-tag
[ 4]: .rela.plt
[ 5]: .init
[ 6]: .plt
[ 7]: .text
[ 8]: __libc_freeres_fn
[ 9]: .fini
[10]: .rodata
[11]: .stapsdt.base
[12]: .eh_frame
[13]: .gcc_except_table
[14]: .tdata
[15]: .tbss
[16]: .init_array
[17]: .fini_array
[18]: .data.rel.ro
[19]: .got
[20]: .got.plt
[21]: .data
[22]: __libc_subfreeres
[23]: __libc_IO_vtables
[24]: __libc_atexit
[25]: .bss
[26]: __libc_freeres_ptrs
[27]: .comment
[28]: .note.stapsdt
[29]: .shstrtab

ERROR: Couldn't find symbol table
#+END_SRC

* somefuncs.o missing symbol 1
Print an error due to requested symbol not being present.
#+TESTY: program='./findfunc test-input/somefuncs.o not_there print'
#+BEGIN_SRC text
file_bytes at: 0x600000000000
Section Headers Found:
- 904 bytes from start of file
- 12 sections total
- 0x600000000388 section header virtual address
Section Header Names in Section 11
- 800 bytes from start of file
- 103 total bytes
- 0x600000000320 .shstrtab virtual address

Scanning Section Headers for Relevant Sections
[ 0]: 
[ 1]: .text
[ 2]: .data
[ 3]: .bss
[ 4]: .comment
[ 5]: .note.GNU-stack
[ 6]: .note.gnu.property
[ 7]: .eh_frame
[ 8]: .rela.eh_frame
[ 9]: .symtab
[10]: .strtab
[11]: .shstrtab

.symtab located
- 408 bytes from start of file
- 216 bytes total size
- 24 bytes per entry
- 9 number of entries
- 0x600000000198 .symtab virtual addres
.strtab located
- 624 bytes from start of file
- 75 total bytes in section
- 0x600000000270 .strtab virtual addres
.text located
- 64 bytes offset from start of file
- 0x0 preferred address for .text
- 0x600000000040 .text virtual addres

Scanning Symbol Table for symbol 'not_there'
[ 0]: 
[ 1]: somefuncs.c
[ 2]: 
[ 3]: return_five
[ 4]: global_int
[ 5]: my_pow
[ 6]: an_array
[ 7]: triple
[ 8]: meaning_of_life

ERROR: Symbol 'not_there' not found in symbol table
#+END_SRC

* somefuncs.o missing symbol 2
Print an error due to requested symbol not being present.
#+TESTY: program='./findfunc test-input/somefuncs.o not_there call "int (*)(int,int)" 2 8'
#+BEGIN_SRC text
file_bytes at: 0x600000000000
Section Headers Found:
- 904 bytes from start of file
- 12 sections total
- 0x600000000388 section header virtual address
Section Header Names in Section 11
- 800 bytes from start of file
- 103 total bytes
- 0x600000000320 .shstrtab virtual address

Scanning Section Headers for Relevant Sections
[ 0]: 
[ 1]: .text
[ 2]: .data
[ 3]: .bss
[ 4]: .comment
[ 5]: .note.GNU-stack
[ 6]: .note.gnu.property
[ 7]: .eh_frame
[ 8]: .rela.eh_frame
[ 9]: .symtab
[10]: .strtab
[11]: .shstrtab

.symtab located
- 408 bytes from start of file
- 216 bytes total size
- 24 bytes per entry
- 9 number of entries
- 0x600000000198 .symtab virtual addres
.strtab located
- 624 bytes from start of file
- 75 total bytes in section
- 0x600000000270 .strtab virtual addres
.text located
- 64 bytes offset from start of file
- 0x0 preferred address for .text
- 0x600000000040 .text virtual addres

Scanning Symbol Table for symbol 'not_there'
[ 0]: 
[ 1]: somefuncs.c
[ 2]: 
[ 3]: return_five
[ 4]: global_int
[ 5]: my_pow
[ 6]: an_array
[ 7]: triple
[ 8]: meaning_of_life

ERROR: Symbol 'not_there' not found in symbol table
#+END_SRC

* somefuncs.o not a function 1
Print an error due to requested symbol not being a function.
#+TESTY: program='./findfunc test-input/somefuncs.o global_int print'
#+BEGIN_SRC text
file_bytes at: 0x600000000000
Section Headers Found:
- 904 bytes from start of file
- 12 sections total
- 0x600000000388 section header virtual address
Section Header Names in Section 11
- 800 bytes from start of file
- 103 total bytes
- 0x600000000320 .shstrtab virtual address

Scanning Section Headers for Relevant Sections
[ 0]: 
[ 1]: .text
[ 2]: .data
[ 3]: .bss
[ 4]: .comment
[ 5]: .note.GNU-stack
[ 6]: .note.gnu.property
[ 7]: .eh_frame
[ 8]: .rela.eh_frame
[ 9]: .symtab
[10]: .strtab
[11]: .shstrtab

.symtab located
- 408 bytes from start of file
- 216 bytes total size
- 24 bytes per entry
- 9 number of entries
- 0x600000000198 .symtab virtual addres
.strtab located
- 624 bytes from start of file
- 75 total bytes in section
- 0x600000000270 .strtab virtual addres
.text located
- 64 bytes offset from start of file
- 0x0 preferred address for .text
- 0x600000000040 .text virtual addres

Scanning Symbol Table for symbol 'global_int'
[ 0]: 
[ 1]: somefuncs.c
[ 2]: 
[ 3]: return_five
[ 4]: global_int
[ 5]: my_pow
[ 6]: an_array
[ 7]: triple
[ 8]: meaning_of_life

Found 'global_int' in symbol table
- 4 size
- 2 section index
- 17 info
ERROR: 'global_int' is not a function
#+END_SRC

* somefuncs.o not a function 2
Print an error due to requested symbol not being a function.
#+TESTY: program='./findfunc test-input/somefuncs.o an_array call "void (*)(int*)"'
#+BEGIN_SRC text
file_bytes at: 0x600000000000
Section Headers Found:
- 904 bytes from start of file
- 12 sections total
- 0x600000000388 section header virtual address
Section Header Names in Section 11
- 800 bytes from start of file
- 103 total bytes
- 0x600000000320 .shstrtab virtual address

Scanning Section Headers for Relevant Sections
[ 0]: 
[ 1]: .text
[ 2]: .data
[ 3]: .bss
[ 4]: .comment
[ 5]: .note.GNU-stack
[ 6]: .note.gnu.property
[ 7]: .eh_frame
[ 8]: .rela.eh_frame
[ 9]: .symtab
[10]: .strtab
[11]: .shstrtab

.symtab located
- 408 bytes from start of file
- 216 bytes total size
- 24 bytes per entry
- 9 number of entries
- 0x600000000198 .symtab virtual addres
.strtab located
- 624 bytes from start of file
- 75 total bytes in section
- 0x600000000270 .strtab virtual addres
.text located
- 64 bytes offset from start of file
- 0x0 preferred address for .text
- 0x600000000040 .text virtual addres

Scanning Symbol Table for symbol 'an_array'
[ 0]: 
[ 1]: somefuncs.c
[ 2]: 
[ 3]: return_five
[ 4]: global_int
[ 5]: my_pow
[ 6]: an_array
[ 7]: triple
[ 8]: meaning_of_life

Found 'an_array' in symbol table
- 6 size
- 2 section index
- 17 info
ERROR: 'an_array' is not a function
#+END_SRC